Malicious PDF — malware analysis report

Static analysis result for SHA-256 122a204ac6548a32…

MALICIOUS

PDF

99.5 KB Created: 2021-08-20 05:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 251237146ed0114f690aba6b4970b8ce SHA-1: ff71088594badee0b2ef8377ba1a5ec9b49b9c7c SHA-256: 122a204ac6548a328bb65a56c3566793a0e660c5a72085e9b4493f2baa491b1f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links, many pointing to compromised WordPress sites. This structure is indicative of a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160e97f1af133a---surovipatekasudarirodobot.pdf In PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/8fpomgkc3ej9o68d5o72d7osld/43524026308.pdfIn PDF document text
    • http://www.ghidmariaj.ro/app/webroot/files/ckfinder/userfiles/files/sebizukiletif.pdfIn PDF document text
    • http://dakmet.pl/upload/gixefegakaf.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b0cd50264---pibupijetulenarisipujusaz.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/72c6aabdd789d8669cb6967c835e16e4/tefuxezevowusezufekozu.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777f5ad71c2---sumoxuni.pdfIn PDF document text
    • http://alarmy-kamery24.pl/userfiles/file/25777842601.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2ce59b4f6---xaguroputekazumibemok.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/ebea26a329bab8b99b38f43641971303/79207818504.pdfIn PDF document text
    • http://lahma.pl/_u/userfiles/file/12336757743.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a9f61af75---denew.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/485c22ef42863e7a397eea616140c91c/fogiradatebumo.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/ahrs53lek479qcr8vcg6urlq1n/lolaxifinapewibixowubu.pdfIn PDF document text
    • https://tranduongauto.com/app/webroot/files/images/pages/files/75193749270.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/6578c0b046ba561bb42f5192c8bd8588/sipolonusasidatudedorir.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a697e6d4871---50039877647.pdfIn PDF document text
    • http://asokmontridental.com/userfiles/file/sefojejilu.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ec5a43e02---doxenisideluluxitalo.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160793e4c0649b---wixapesajotefisaziwet.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/4iilkp2rej8rb66voad36bo587/79404769753.pdfIn PDF document text
    • http://sun-green.be/ckfinder/userfiles/files/wudanutimususapobawisodes.pdfIn PDF document text
    • http://koyomisushi.com/uploads/files/69541050697.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16077d669acc5e---89005245993.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/wisojufaxafekodejini.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/41709012175.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=star+wars+ahsoka+tano+bookPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12304 10328 bytes
SHA-256: 9487fefbd340f95f1fbb6cac4a207f3b53519d950b9173185d7bd7237662767b
font_01_sfnt_off00013a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A56 17880 bytes
SHA-256: 9e6f682005ba68d4e0bd6ee9a69a7babfdcefff5bd0360c7103c3d792c8e0bb9
font_02_sfnt_off00016872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16872 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1